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that the system was switched off properly.
2. Inexpensive ATX power supplies often have problems with short AC power sags.
When using these ATX power supplies it is possible that the system turns off but
does not switch back on, even when the PS_ON# signal is asserted correctly by the
module. In this case, the internal circuitry of the ATX power supply has become
confused. Usually another AC power off/on cycle is necessary to recover from this
situation.
3. Unlike other module designs available in the embedded market, a CMOS battery is
not required by congatec modules to support the 'Power Loss Control' feature.
8.8 Boot Device Priority
Feature
Options
Description
Boot Order
(Device Order 1-6)
None
Floppy Disk
CD-ROM Drive
Hard Drive
USB Hard Drive/Flash Drive
USB Floppy Disk
USB CD-ROM Drive
Network Drive
Determines the boot order for each device. The
default boot order is:
1.
None
2.
CD-ROM Drive
3.
Hard Drive
4.
USB Floppy Disk
5.
USB Hard Drive/Flash Disk
6.
USB CD-ROM Drive
7.
Network Boot
Note
The second parallel ATA channel and the two Serial ATA channels are implemented
through the use of the VIA VT6421 RAID controller located on the conga-XLX. The VIA
VT6421 RAID controller requires a boot option ROM and it is for this reason that the
boot priority of the RAID controller can not be controlled using the BIOS setup node
“Boot Device Priority”. The boot option ROM hooks interrupt 19 and therefore the SATA
device will always be the last device in the boot priority. The system will only boot from
the SATA device if none of the other boot devices listed are found or if all the boot
device options in the priority list are set to “None”.
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